Has anyone had any problems with dedomed XM-L2 U4 1As lately? The last 3 that I’ve dedomed (with gas) have popped on me. I’m using one of the newer fet+1 drivers from mtn with 22awg wire. Each one has popped at the bond wires. Both wires were burned through on the first two, the third still has one intact and the led barely lights up. One was on a 20mm tpad, one was on a 20mm noctigon, the third one was on a 14mm tpad. I’ve never had this issue with them before. I used a Samsung 30Q each time as well.

Pardon the noob question, but does that mean you run the led out of the heatsink to heat it up and then slice off the dome with a blade?

Yeah, just connect a couple of leads to the mcpcb that the LED is reflowed to and connect the other ends to a battery. Turn it on for about 15-20 seconds and slice the corners. Turn it on for about 15-20 seconds again and slice under the dome towards the bond wires and lift before you get there so you don’t break the wires. Then carefully clean off any left over residue. There’s a few vids floating around of members hot dedoming.

Yeah, just connect a couple of leads to the mcpcb that the LED is reflowed to and connect the other ends to a battery. Turn it on for about 15-20 seconds and slice the corners. Turn it on for about 15-20 seconds again and slice under the dome towards the bond wires and lift before you get there so you don’t break the wires. Then carefully clean off any left over residue. There’s a few vids floating around of members hot dedoming.

Pardon the noob question, but does that mean you run the led out of the heatsink to heat it up and then slice off the dome with a blade?

Yeah, just connect a couple of leads to the mcpcb that the LED is reflowed to and connect the other ends to a battery. Turn it on for about 15-20 seconds and slice the corners. Turn it on for about 15-20 seconds again and slice under the dome towards the bond wires and lift before you get there so you don’t break the wires. Then carefully clean off any left over residue. There’s a few vids floating around of members hot dedoming.

So do you lift from the side with the bond wires or lift up from the opposite side then flip it towards the bond wires?

Pardon the noob question, but does that mean you run the led out of the heatsink to heat it up and then slice off the dome with a blade?

Yeah, just connect a couple of leads to the mcpcb that the LED is reflowed to and connect the other ends to a battery. Turn it on for about 15-20 seconds and slice the corners. Turn it on for about 15-20 seconds again and slice under the dome towards the bond wires and lift before you get there so you don’t break the wires. Then carefully clean off any left over residue. There’s a few vids floating around of members hot dedoming.

So do you lift from the side with the bond wires or lift up from the opposite side then flip it towards the bond wires?